diff --git a/prisma/migrations/20260331000000_add_partnership_stat_unique_constraint/migration.sql b/prisma/migrations/20260331000000_add_partnership_stat_unique_constraint/migration.sql
new file mode 100644
index 0000000..daadfd1
--- /dev/null
+++ b/prisma/migrations/20260331000000_add_partnership_stat_unique_constraint/migration.sql
@@ -0,0 +1,2 @@
+-- Add unique constraint to PartnershipStat table
+CREATE UNIQUE INDEX "partnership_stats_player1Id_player2Id_key" ON "partnership_stats"("player1Id", "player2Id");